According to the latest scans from CoroCoro, Elesa's sprite was featured in one of the game screenies. She will have the coat on. Though as a HUGE fan of her new look, I can't wait to use them as a future theme of mine! <333

Ignoring Koga & Wallace, which Gym Leader(s) is worthy to be an Elite Four or Champion? Explain your reasoning.

Tie between Lt. Surge and Sabrina on this one, since both of them proved their very best in battles both Anime-wise and in the games. You can't really beat both of them in just one time, right?

Though...I believe Elesa also has a slim chance of becoming part of the E4, judging by how tough she is to battle with, and her Pokemon are really rough to beat.